Keystone or rectangular screen - AVS Forum | Home Theater Discussions And Reviews
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Old 07-07-2013, 02:35 PM - Thread Starter
kevpatts's Avatar
Join Date: Feb 2013
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Hey all,

I have just ceiling mounted up my new Optoma HD25-LV. I am going to be using black widow paint to pain a wall for the screen, but I have a question:

Okay, the bottom of the screen has to be at 19 inches from the ground due to it having to be above a radiator on the wall (rented house). This means that I'm looking up at the screen from my seating position 4 metres away.

Should therefore the screen be rectangular relative to the wall (true rectangle) or keystoned so that it appears rectangle relative to the seating position?

I would normally make it a true rectangle but I've noticed that if I set keystoning to 0 with my current setup, I get a very close to perfect looking rectangle from my sitting position. One thing that I'm considering is that digital keystoning can introduce visual artfacts which I'm trying to avoid.

What would your opinions be?


Amps: Tag McLaren AV32R-DP, 3x Musical Fidelity P140
Speakers: B&W 604, 601, LCR600, ASW675 Series 3
Cables: Nordost Super Flatline MKIII
Video: Optoma HD25-LV, 140" Black Widow screen
Sources: Custom built XBMC/Plex HTPC, PS4, Xbox 360, FreeSat HD & Saorview HD
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